Feeding mechanism for middlings-purifiers



(No Model.) 3 Sheets-Sheet 1.v

G. A. SMITH.

FEEDING MECHANISM FOR MIDDLINGS PURIFIERS.

Patented Mar. 30, 1886.

Inventar N. PETERs. Phomumn n mr, wamm lw. nc.

(No Model.) 3 Sheets-Sheet 2. O. A. SMITH.

FEEDING MECHANISM FOR MIDDLINGS PURIFIERS.

No. 339,028. Patented Mar. 30, 1886.

, MM Gum W WA 7 W a sheets-sheet 3.

(No Model.)

(LA. SMITH.

FEEDING MECHANISM FOR MIDDLINGS PURIFIERS.

Patented Mar. 30, 1886.

Wm Chg/MW M 4.

N. PETERS. Pnulwulm npher. Wa'dlifigfom D. c.

UN TED STATES PATENT @rrrcn.

CHARLES A. SMITH, OF JACKSON, MICHIGAN.

FEEDING MECHANISM FOR MlDDLiNGS-PURIFIERS.

EEPEQIEIZCATION forming part of Letters Patent No. 339,028, dated March 30, 1886.

Application filed June 26, 1884. Serial No. 130,075.

To all whom it may concern:

Be it known that 1, CHARLES A. SMITH, a citizen of the United States, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain new andnse- .ful Improvements in Feeding Mechanism for llfiddlings-Purifiers, of which the following is a specification, reference being had therein to the accompanying drawings.

Figure 1 is a side elevation of the front or receiving end of a middlingspurifler containing my invention, a part of the outer wall or casin g and one of the posts being broken away. Fig. 2 is a front view, enlarged and partly in section, of so much of a purifier as is necessary to show the invention. Fig. 3 is a horizontal section on line 2 z of Fig. 2. Fig. 4 is a longitudinal vertical section on line 1 31, Fig. 3.

Similar letters of reference indicate like parts in all the figures.

AA A represent the frame-work of a middlingspurifier, and A A the casing.

B B is the shaker, to which a reciprocating motion is imparted by a pitman, B, which is connected at its front end with an eccentric, B and at its rear end to a cross bar or girt, I), supported at its ends in the side pieces of the shaker-frame. By preference I construct this pitman with a spiral-spring section, b, intermediate between its ends; but as my invention relates specifically to the feeding devices, by means of which the middlings may be delivered to the shaker or screen, it is not necessary to describe specifically the other parts of the purifier, which may be of any usual or approved construction adapted to receive my invention.

Referring to the drawings, 0 represents, generally, a shallow box or shoe, which, in this instance, is attached directly to the shakerframe, so as to vibrate therewith. As indicated in Fig. 3, the front edge of this shoe extends across the entire width of the shaker, while its rear end is somewhat narrower, which is the form that I usually prefer; but I do not wish to be limited to any particular shape. The top of this shoe may be partly or wholly covered by a deck, 0. In practice, however, I prefer that this deck should extend from the rear of the shoe about halfway to its front edge.

D is a tube-section mounted upon the deck (No model.)

0 near its rear edge and about midway be tween its ends. I ordinarily prefer that this tube-section should be made of sheet metal and square in crosssection, there being an opening of corresponding size through the deck, into which it is fitted, with its lower edge about flush with the under surface of the deck.

I) is a feed-spout stationarily suspended from the roof or deck of the machine, with its lower end projecting a short distance into the tubescction D. The lower end of this feed-spout should be of somewhat less diameter than the tube-section, so that when the part-s are arranged as shown in the drawings the shoe can vibrate the required distance without bringing the tubescctiou 1) into contact with the feed-spout. I prefer to make these parts of such relative sizes in order that the vibrations of the shoe may not tend to loosen the fastcnings of the feedspout; but this may not be found essential under some circumstances.

I propose to make the feed-spout D of tin or other sheet metal, and round in cross-section; but it may be made of other material, and might, in fact, be made of canvas or other flexible fabric, or even of leather or similar material, in which case it might befonnd best to connect firmly its lower end with the tubesection D or to the deck 0. The upper surface of the bottom of the shoe should be inclined slightly, its front edge being the lowest.

0 c are aserics of distributing fingers or ribs arranged suliistantially radially relative to the tube-section D, to facilitate a uniform distribution of the middlings across the entire width of the screen. I have shown in Fig. 3 such number and arrangement of these lingers or ribs as will secure good results under ordinary circumstances; but I do not wish to be limited to either the number there shown or their exact arrangement. As indicated in Fig. 4, these fingers or ribs are higher at their rear ends than at their front ends.

E is an adjustable gate or gage-bar of a length about equal to the width of the shoe be tween its end walls at its front edge, and rests upon the upper edges of the ribs 0 c.

E E are flexible links or straps, each attached at one end to the gage-bar, and at its opposite end to the deck 0, preferably by means of a slot in the deck through which the link passes, and a wedge, e, by means of which devices the links can be so adjusted as to regulate the distance to which the gage-bar can move toward the front edge of the shoe.

When the machine is in operation, the mid dlings, which come down through the spout D and the tube-section D, fall upon the bottom of the shoe, and by the shaking motion of the shoe are fed forward and discharged over its edge, and under ordinary circumstances the middlings will bank up against the rear edge of the gage-bar to such an extent as to insure that they will be fed upon the boltcloth in a sheet or film of substantially uniform thickness across the entire width of the shaker, because the discharge-throat between the lower edge of the gage-bar and the bottom of the shoe, and through which the middlings pass, will be of uniform thickness from end to end of the'gage-bar. The width of this throat may be varied by shifting the bar toward or from the front edge of the shoe, this varia tion in the width of the throat being regulated in a measure by the variation in the height up and down of the ribs, which, as above explained, are lowest at their front ends, so that as the gage'bar is drawn backward the width of the throat is increased. It will be seen that after passing the throat the material is subjected to ashaking operation,which tends to bring the lighter particles to the upper surface of the layer or sheet, so that when the material passes over the edge of the shoe and thence to the bolt-cloth the heavier particles can fall more rapidly than the lighter particles-an operation which is very desirable.

IVhat I claim is 1. In a 1niddlingspnrifier, the combination,

with the shaker, of a vibrating shoe, a movable gage-bar arranged above the bottom of the shoe and in close proximity thereto, supports for'the gage-bar inclined relatively to the bottom of the shoe, and means for adj usting the position of the gage-bar upon said supports, whereby the width of the throat through which the middlings are fed may be regulated, substantially as set forth.

2. In a middlings-purifier, the combination, with the shaker, of avibrating shoe, the gagebar, and the adjustable straps adapted to support the gage-bar against the pressure of the lniddlings, substantially as set forth.

3. In a middlings-purifier, the combination, with the shaker, of a feed-spout and a vibratin g shoe provided upon its upper surface with a series of ribs diverging'froni the feed-spout to that end'of the shoe over which middlings are discharged to the shaker, substantially as set forth.

4. Ina niiddlings-purifier, the combination, with the shaker, of a vibrating shoe provided upon the upper surface of its bottom board with a series of distributing-ribs, c c, which are inclined relatively to the bottom board of the shoe, they being higher at their rear ends than at their front ends, a gage-bar supported upon said ribs, and means for adjusting the position of said gage-bar upon the ribs, whereby the size of the throat through which the iniddlings are fed is regulated, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES A. SMITH.

IVitnesses:

O. E. BENNETT, G-Eo. S. BENNETT. 

